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• ffmpeg : Combine/merge multiple mp4 videos not working, output only contains the first video

  17 août 2021, par dtbaker

  Here is the command I am using to combine multiple videos :

  



  ffmpeg -i 75_540_38HQ2.mp4 -i 76_70_20.mp4 -i 76_173_80.mp4 -i 81_186_35.mp4 -vcodec copy -acodec copy Mux1.mp4

  



  The resulting Mux1.mp4 does not contain all videos. Only the first video (75_540_38HQ2.mp4). The file size of the source and resulting video is below (as you can see, resulting video is slightly larger than first vid) :

  



  
$ ls -lh
-rw-r—r— 1 dbaker dbaker  42M 2011-03-24 11:59 75_540_38HQ2.mp4
-rw-r—r— 1 dbaker dbaker 236M 2011-03-24 12:09 76_173_80.mp4
-rw-r—r— 1 dbaker dbaker  26M 2011-03-24 12:05 76_70_20.mp4
-rw-r—r— 1 dbaker dbaker  54M 2011-03-24 12:15 81_186_35.mp4
-rw-r—r— 1 dbaker dbaker  44M 2011-03-24 14:48 Mux1.mp4


  



  Here is the output of the ffmpeg command. To me it looks ok, showing the multiple source inputs and the single output.

  



  
FFmpeg version SVN-r26402, Copyright (c) 2000-2011 the FFmpeg developers
  built on Mar 21 2011 18:05:32 with gcc 4.4.5
  configuration : —enable-gpl —enable-version3 —enable-nonfree —enable-postproc —enable-libfaac —enable-libmp3lame —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libtheora —enable-libvorbis —enable-libvpx —enable-libx264 —enable-libxvid —enable-x11grab
  libavutil     50.36. 0 / 50.36. 0
  libavcore      0.16. 1 /  0.16. 1
  libavcodec    52.108. 0 / 52.108. 0
  libavformat   52.93. 0 / 52.93. 0
  libavdevice   52. 2. 3 / 52. 2. 3
  libavfilter    1.74. 0 /  1.74. 0
  libswscale     0.12. 0 /  0.12. 0
  libpostproc   51. 2. 0 / 51. 2. 0
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '75_540_38HQ2.mp4' :
  Metadata :
    major_brand : isom
    minor_version : 512
    compatible_brands : isomiso2avc1mp41
    creation_time : 1970-01-01 00:00:00
    encoder : Lavf52.93.0
  Duration : 00:00:29.99, start : 0.000000, bitrate : 11517 kb/s
    Stream #0.0(eng) : Video : h264, yuv420p, 1280x960 [PAR 1:1 DAR 4:3], 11575 kb/s, 29.94 fps, 29.97 tbr, 30k tbn, 59.94 tbc
    Metadata :
      creation_time : 1970-01-01 00:00:00
    Stream #0.1(eng) : Audio : aac, 48000 Hz, stereo, s16, 127 kb/s
    Metadata :
      creation_time : 1970-01-01 00:00:00
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '76_70_20.mp4' :
  Metadata :
    major_brand : isom
    minor_version : 512
    compatible_brands : isomiso2avc1mp41
    creation_time : 1970-01-01 00:00:00
    encoder : Lavf52.93.0
  Duration : 00:00:19.98, start : 0.000000, bitrate : 10901 kb/s
    Stream #1.0(eng) : Video : h264, yuv420p, 1280x960 [PAR 1:1 DAR 4:3], 10804 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc
    Metadata :
      creation_time : 1970-01-01 00:00:00
    Stream #1.1(eng) : Audio : aac, 48000 Hz, stereo, s16, 128 kb/s
    Metadata :
      creation_time : 1970-01-01 00:00:00
Input #2, mov,mp4,m4a,3gp,3g2,mj2, from '76_173_80.mp4' :
  Metadata :
    major_brand : isom
    minor_version : 512
    compatible_brands : isomiso2avc1mp41
    creation_time : 1970-01-01 00:00:00
    encoder : Lavf52.93.0
  Duration : 00:03:09.99, start : 0.000000, bitrate : 10393 kb/s
    Stream #2.0(eng) : Video : h264, yuv420p, 1280x960 [PAR 1:1 DAR 4:3], 10321 kb/s, 29.96 fps, 29.97 tbr, 30k tbn, 59.94 tbc
    Metadata :
      creation_time : 1970-01-01 00:00:00
    Stream #2.1(eng) : Audio : aac, 48000 Hz, stereo, s16, 128 kb/s
    Metadata :
      creation_time : 1970-01-01 00:00:00

Seems stream 0 codec frame rate differs from container frame rate : 119.88 (120000/1001) -> 30000.00 (30000/1)
Input #3, mov,mp4,m4a,3gp,3g2,mj2, from '81_186_35.mp4' :
  Metadata :
    major_brand : isom
    minor_version : 512
    compatible_brands : isomiso2avc1mp41
    creation_time : 1970-01-01 00:00:00
    encoder : Lavf52.93.0
  Duration : 00:00:35.00, start : 0.000000, bitrate : 12700 kb/s
    Stream #3.0(eng) : Video : h264, yuv420p, 1280x720 [PAR 1:1 DAR 16:9], 12620 kb/s, 59.91 fps, 30k tbr, 60k tbn, 119.88 tbc
    Metadata :
      creation_time : 1970-01-01 00:00:00
    Stream #3.1(eng) : Audio : aac, 48000 Hz, stereo, s16, 128 kb/s
    Metadata :
      creation_time : 1970-01-01 00:00:00
Output #0, mp4, to 'Mux1.mp4' :
  Metadata :
    major_brand : isom
    minor_version : 512
    compatible_brands : isomiso2avc1mp41
    creation_time : 1970-01-01 00:00:00
    encoder : Lavf52.93.0
    Stream #0.0(eng) : Video : libx264, yuv420p, 1280x960 [PAR 1:1 DAR 4:3], q=2-31, 11575 kb/s, 30k tbn, 29.97 tbc
    Metadata :
      creation_time : 1970-01-01 00:00:00
    Stream #0.1(eng) : Audio : libfaac, 48000 Hz, stereo, 128 kb/s
    Metadata :
      creation_time : 1970-01-01 00:00:00
Stream mapping :
  Stream #0.0 -> #0.0
  Stream #2.1 -> #0.1
Press [q] to stop encoding
frame=  883 fps=632 q=-1.0 Lsize=   44730kB time=29.40 bitrate=12465.1kbits/s    
video:41678kB audio:2969kB global headers:0kB muxing overhead 0.184548%


  



  Am I doing something blindingly stupid here ?

  



  The source videos came from a video camera, and are small snippets taken with ffmpeg -i bigfile.mp4 -ss 20 -t 10 -vcodec copy etc..

  



  Thanks heaps !!
Dave

  



  ---

  



  Edit : couldn't solve it so I just use avidemux GUI tool. It seemed to append the MP4's just fine.

  



  Must be a problem with MP4's or just the ones that come off a gopro camera.

  


• Having trouble obtaining the time from RTP Timestamps obtained through OpenCV

  24 août 2019, par Fr0sty

  I am finding it a bit difficult trying to understand whether or not the hack around with FFmpeg and OpenCV really provided a RTP timestamp. My last post helped a little bit but got me stuck in trying to validate the timestamps obtained through this work around by modifying ffmpeg and opencv.

  FFmpeg version : 4.1.0
  OpenCV version : 3.4.1

  import cv2
  
  import time
  
  from datetime import datetime, date
  
  
  
  uri = 'rtsp://admin:password@192.168.1.66:554/Streaming/Channels/101'
  
  cap = cv2.VideoCapture(uri)
  
  '''One is the offset between the two epochs. Unix uses an epoch located at 1/1/1970-00:00h (UTC) and NTP uses 1/1/1900-00:00h.
  
  This leads to an offset equivalent to 70 years in seconds (there are 17 leap years between the two dates so the offset is'''
  
  time_offset = 2208988800 # (70*365 + 17)*86400 = 2208988800 (in seconds)
  
  # offset = 3775484294
  
  days = 43697
  
  pdat = "1900-01-01 00:00:00:00"
  
  mdat = "2019-08-23 22:02:44:00" # str(datetime.now()) + str(datetime.now().time())
  
  pdate = datetime.strptime(pdat, "%Y-%m-%d %H:%M:%S:%f").date()
  
  mdate = datetime.strptime(mdat, "%Y-%m-%d %H:%M:%S:%f").date()
  
  delta = (mdate - pdate).days
  
  offset = delta * 86400
  
  def time_delta(s):
  
      return (s - time_offset)
  
  
  
  while True:
  
      frame_exists, curr_frame = cap.read()
  
      if frame_exists:
  
          seconds = cap.getRTPTimeStampSeconds()
  
          fraction = cap.getRTPTimeStampFraction()
  
          timestamp = cap.getRTPTimeStampTs()
  
          unix_offset = seconds - time_offset
  
          msec = int((int(fraction) / 0xFFFFFFFF) * 1000.0)
  
          ts = float(str(unix_offset) + "." + str(msec))
  
          # print("Timestamp per Frame:%i" % timestamp)
  
          print((datetime.fromtimestamp(float(ts) + offset)))
  
  cap.release()

  My Output :

  On August 23, 2019 at 22:02

  ...
  
  2019-08-23 13:59:52.781000
  
  2019-08-23 13:59:52.726000
  
  2019-08-23 13:59:52.671000
  
  2019-08-23 13:59:52.616000
  
  2019-08-23 13:59:52.561000
  
  2019-08-23 13:59:52.506000
  
  2019-08-23 13:59:52.451000
  
  2019-08-23 13:59:52.396000
  
  2019-08-23 13:59:52.342000
  
  2019-08-23 13:59:52.287000
  
  2019-08-23 13:59:52.232000
  
  2019-08-23 13:59:52.177000
  
  2019-08-23 13:59:52.122000
  
  2019-08-23 13:59:52.067000
  
  2019-08-23 13:59:52.012000
  
  2019-08-23 13:59:53.570000
  
  2019-08-23 13:59:53.020000
  
  2019-08-23 13:59:53.847000
  
  2019-08-23 13:59:53.792000

  I’ve noticed how the time increments weirdly (that’s not suppose to happen in the real, current time), such as the last two lines and a few others in between in the output. A bit flabbergasted as to what went wrong. Also trying this out on multiple IP cameras, with each showing a different timestamp probably related to when they were turned on.

• Concatenate audio with image and video using ffmpeg

  9 mai 2018, par huynq9

  I have 1 image, 1 audio file and 1 video. I would like to merge all of them to make a video which will

  • show the image and play audio file for the first 10s
  • play the video file

  here is what I was trying to do so far.

  ffmpeg \
  
  -loop 1 -framerate 24 -t 10 -i item1.jpg \
  
  -i "https://audio-ssl.itunes.apple.com/apple-assets-us-std-000001/Music/66/58/f7/mzi.eoocfriy.aac.p.m4a" \
  
  -i item4.mp4 \
  
  -filter_complex \
  
  "[0]scale=432:432,setdar=1[img1]; \
  
   [1]volume=1[aud1]; \
  
   [2]scale=432:432,setdar=1[vid1]; \ 
  
   [img1][aud1][vid1] concat=n=3:v=1:a=1" \
  
  outputfile.mp4

  I got the error :

  [Parsed_setdar_4 @ 0x3063780] Media type mismatch between the
  ’Parsed_setdar_4’ filter output pad 0 (video) and the
  ’Parsed_concat_6’ filter input pad 1 (audio) [AVFilterGraph @
  0x30479a0] Cannot create the link setdar:0 -> concat:1 Error
  initializing complex filters. Invalid argument

  I tried to googled but still cannot figure out what I am doing wrong ?

  Updated :
  I ran the following command :

  ffmpeg \
  
  -loop 1 -framerate 24 -t 10 -i item1.jpg \
  
  -t 10 -i "https://audio-ssl.itunes.apple.com/apple-assets-us-std-000001/Music/66/58/f7/mzi.eoocfriy.aac.p.m4a" \
  
  -i item4.mp4 \
  
  -f lavfi -t 1 -i anullsrc \
  
  -filter_complex \
  
  "[0]scale=432:432,setsar=1[img1]; \
  
  [2]scale=432:432,setsar=1[vid1]; \ 
  
  [img1][1][vid1][3] concat=n=2:v=1:a=1" \
  
  outputfile.mp4

  and got the following error :

  ffmpeg version 3.3.3 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
  
    configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libfreetype --enable-gnutls --disable-ffserver --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libtheora --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvidstab --enable-libwavpack --enable-nvenc --enable-libzimg
  
    libavutil      55. 58.100 / 55. 58.100
  
    libavcodec     57. 89.100 / 57. 89.100
  
    libavformat    57. 71.100 / 57. 71.100
  
    libavdevice    57.  6.100 / 57.  6.100
  
    libavfilter     6. 82.100 /  6. 82.100
  
    libavresample   3.  5.  0 /  3.  5.  0
  
    libswscale      4.  6.100 /  4.  6.100
  
    libswresample   2.  7.100 /  2.  7.100
  
    libpostproc    54.  5.100 / 54.  5.100
  
  Input #0, image2, from 'item1.jpg':
  
    Duration: 00:00:00.04, start: 0.000000, bitrate: 8365 kb/s
  
      Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 432x432 [SAR 1:1 DAR 1:1], 24 fps, 24 tbr, 24 tbn, 24 tbc
  
  Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'https://audio-ssl.itunes.apple.com/apple-assets-us-std-000001/Music/66/58/f7/mzi.eoocfriy.aac.p.m4a':
  
    Metadata:
  
      major_brand     : M4A
  
      minor_version   : 0
  
      compatible_brands: M4A mp42isom
  
      creation_time   : 1983-06-16T23:20:44.000000Z
  
      iTunSMPB        :  00000000 00000840 00000000 00000000001423C0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
  
    Duration: 00:00:29.98, start: 0.047891, bitrate: 285 kb/s
  
      Stream #1:0(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 271 kb/s (default)
  
      Metadata:
  
        creation_time   : 1983-06-16T23:20:44.000000Z
  
  Input #2, mov,mp4,m4a,3gp,3g2,mj2, from 'item4.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      creation_time   : 1970-01-01T00:00:00.000000Z
  
      encoder         : Lavf53.24.2
  
    Duration: 00:00:13.70, start: 0.000000, bitrate: 615 kb/s
  
      Stream #2:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 320x240 [SAR 1:1 DAR 4:3], 229 kb/s, 15 fps, 15 tbr, 15360 tbn, 30 tbc (default)
  
      Metadata:
  
        creation_time   : 1970-01-01T00:00:00.000000Z
  
        handler_name    : VideoHandler
  
      Stream #2:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 382 kb/s (default)
  
      Metadata:
  
        creation_time   : 1970-01-01T00:00:00.000000Z
  
        handler_name    : SoundHandler
  
  Input #3, lavfi, from 'anullsrc':
  
    Duration: N/A, start: 0.000000, bitrate: 705 kb/s
  
      Stream #3:0: Audio: pcm_u8, 44100 Hz, stereo, u8, 705 kb/s
  
  [AVFilterGraph @ 0x3955e20] No such filter: ' '
  
  Error initializing complex filters.
  
  Invalid argument